1/2 and 3/4 ton are much different from the rest and each other. from there on up they are similar in style and widths but each has different metal thicknesses, section height, wheelbase, and overall length.
one interesting commonality is that 1 ton and 1-1/2 ton frame are the same exact except for extensions they bolted on the front for the latter. i have a 1 ton but got a cab and from clip from a big bolt in amazing shape. i cant turn down using the front clip cause its so much better than what i had and i honestly like the proportion of the front clip to cab on big blts better. so im making mine basically into a 1-1/2 ton besides my suspension and axles will be a little different.
Don't quote me! check out the manual below for detailed frame dimensions.
http://chevy.oldcarmanualproject.com/chevyresto/52index.htmlTj
